[Mike Kelly]

I think the series 13 is the earlier 113" wb models ,1940. The series 15 are 1941 models ( with the waterfall grill ) 115" wb . Both were known as Vans 15cwt in the Aust. army . GMH kept up with the US year models, everybody here refers to the waterfall grill as 42 but that isn't correct , GMH and the army used 41.